An otolaryngologist, or ENT, is a healthcare specialist who treats conditions affecting your ears, nose and throat. They can also perform head and neck surgeries, including surgeries on your ears, mouth, throat, nose, neck and face.Hearing and balance, swallowing and speech, breathing and sleep issues, allergies and sinuses, head and neck cancer, skin disorders, even facial plastic surgery are just some of the conditions that ENT (ear, nose, and throat) specialists treat.